Tactile annunciator for alerting persons with or without hearing

Details Tactile annunciator for alerting persons with or without hearing Tactile annunciator for alerting persons with or without hearing

1988-09-19

1991-08-13

Reid, Stella

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

D10 49, D10104, D24187

Patent

active

D03190315

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